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      <a id="STKBlowHole"></a>
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      <a id="IndexStkblowhole" class="indexterm"></a>
      <div class="refnamediv">
        <h2>
          <span class="refentrytitle">STKBlowHole</span>
        </h2>
        <p>STKBlowHole — 
      STK clarinet physical model with one register hole and one tonehole. 
    </p>
      </div>
      <div class="refsect1">
        <a id="idp151887216"></a>
        <h2>Description</h2>
        <p>
      This opcode is based on the clarinet model, with the addition of a two-port register hole and a three-port dynamic tonehole implementation.</p>
        <p>
      In this implementation, the distances between the reed/register hole and tonehole/bell are fixed.
      As a result, both the tonehole and register hole will have variable influence on the playing frequency, which is dependent on the length of the air column. In addition, the highest playing freqeuency is limited by these fixed lengths.</p>
      </div>
      <div class="refsect1">
        <a id="idp151889280"></a>
        <h2>Syntax</h2>
        <pre class="synopsis">asignal <span class="command"><strong>STKBlowHole</strong></span> ifrequency, iamplitude, [kreed, kv1[, knoise, kv2[, khole, kv3[, kreg, kv4[, kbreath, kv5]]]]]</pre>
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      <div class="refsect1">
        <a id="idp151891568"></a>
        <h2>Initialization</h2>
        <p>
      <span class="emphasis"><em>ifrequency</em></span> -- Frequency of note played, in Hertz.
    </p>
        <p>
      <span class="emphasis"><em>iamplitude</em></span> -- Amplitude of note played (range 0-1).
    </p>
      </div>
      <div class="refsect1">
        <a id="idp151894096"></a>
        <h2>Performance</h2>
        <p><span class="emphasis"><em>kreed</em></span> -- controller 2, stiffness of reed. Value range of kv1 is 0-127.</p>
        <p><span class="emphasis"><em>knoise</em></span> -- controller 4, gain of noise. Value range of kv2 is 0-127.</p>
        <p><span class="emphasis"><em>khole</em></span> -- controller 11, state of tonehole. Value range of kv3 is 0-127.</p>
        <p><span class="emphasis"><em>kreg</em></span> -- controller 1, state of register. Value range of kv4 is 0-127.</p>
        <p><span class="emphasis"><em>kbreath</em></span> -- controller 128, breath pressure. Value range of kv5 is 0-127.</p>
      </div>
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        <a id="idp151898576"></a>
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              <th align="left">Notes</th>
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                <p>
        The code for this opcode is taken directly from the BlowHole class in the Synthesis Toolkit in C++ by Perry R. Cook and Gary P. Scavone. More on the STK classes can be found here:  
<a class="ulink" href="https://ccrma.stanford.edu/software/stk/classes.html" target="_top"><em class="citetitle">https://ccrma.stanford.edu/software/stk/classes.html</em></a>
</p>
                <p>
        <span class="emphasis"><em>kc1, kv1, kc2, kv2, kc3, kv3, kc4, kv4, kc5, kv5, kc6, kv6, kc7, kv7, kc8, kv8</em></span> -- Up to 8 optional k-rate controller pairs for the STK opcodes.
      Each controller pair consists of a controller number (kc) followed by a controller value (kv). Both the controller numbers and the controller values are krate variables. However, during a performance, normally the controller numbers stay fixed while the corresponding controller values may change at any time.
The order of the controller pair is arbitrary, as long as they are after <span class="emphasis"><em>iamplitude</em></span>. Also, it is not needed that all controller pairs are used.
</p>
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      <div class="refsect1">
        <a id="idp151903056"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the STKBlowHole opcode. It uses the file <a class="ulink" href="examples/STKBlowHole.csd" target="_top"><em class="citetitle">STKBlowHole.csd</em></a>.
     
      </p>
        <div class="example">
          <a id="idp151904928"></a>
          <p class="title">
            <strong>Example 846. Example of the STKBlowHole opcode.</strong>
          </p>
          <div class="example-contents">
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac     <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc    ;;;uncomment -iadc if RT audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o STKBlowHole.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span>  <span class="op">=</span> 1

<span class="oblock">instr</span> 1	

ipch	<span class="op">=</span>	p4
kv1	<span class="op">=</span>	p7						<span class="comment">;stiffness of reed</span>
kv3	<span class="opc">line</span>	p5, p3, p6					<span class="comment">;state of tonehole</span>

asig	<span class="opc">STKBlowHole</span>	<span class="opc">cpspch</span>(ipch), 1, 2, kv1, 4, 100, 11, kv3, 1, 10, 128, 100
	<span class="opc">outs</span>	asig, asig
<span class="oblock">endin</span>

<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>

<span class="stamnt">i</span> 1 0 4 10.00 20 127 100
<span class="stamnt">i</span> 1 + 7 6.09 120  0  10
<span class="stamnt">e</span>
<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
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        <p><br class="example-break" />
    </p>
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      <div class="refsect1">
        <a id="idp151906848"></a>
        <h2>Credits</h2>
        <p>
      </p>
        <table border="0" summary="Simple list" class="simplelist">
          <tr>
            <td>Author: Michael Gogins (after Perry Cook)</td>
          </tr>
          <tr>
            <td>Irreducible Productions</td>
          </tr>
          <tr>
            <td>New York, NY</td>
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        <p>
    </p>
        <p>New in Csound version 5.11</p>
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